English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Analysis of Topological Transitions in Two-dimensional Materials by Compressed Sensing

Acosta, C. M., Ouyang, R., Fazzio, A., Scheffler, M., Ghiringhelli, L. M., & Carbogno, C. (in preparation). Analysis of Topological Transitions in Two-dimensional Materials by Compressed Sensing.

Item is

Files

show Files
hide Files
:
1805.10950.pdf (Preprint), 4MB
Name:
1805.10950.pdf
Description:
File downloaded from arXiv at 2018-05-30 09:02
Visibility:
Public
MIME-Type / Checksum:
application/pdf / [MD5]
Technical Metadata:
Copyright Date:
-
Copyright Info:
-

Locators

show

Creators

show
hide
 Creators:
Acosta, Carlos Mera1, 2, Author
Ouyang, Runhai1, Author              
Fazzio, Adalberto2, 3, Author
Scheffler, Matthias1, Author              
Ghiringhelli, Luca M.1, Author              
Carbogno, Christian1, Author              
Affiliations:
1Theory, Fritz Haber Institute, Max Planck Society, ou_634547              
2Institute of Physics, University of Sao Paulo, CP 66318, 05315-970, Sao Paulo, SP, Brazil, ou_persistent22              
3Brazilian Nanotechnology National Laboratory, CP 6192, 13083-970, Campinas, SP, Brazil, ou_persistent22              

Content

show
hide
Free keywords: Condensed Matter, Materials Science, cond-mat.mtrl-sci
 Abstract: Quantum spin-Hall insulators (QSHIs), i.e., two-dimensional topological insulators (TIs) with a symmetry-protected band inversion, have attracted considerable scientific interest in recent years. In this work, we have computed the topological Z2 invariant for 220 functionalized honeycomb lattices that are isoelectronic to functionalized graphene. Besides confirming the TI character of well-known materials such as functionalized stanene, our study identifies 45 yet unreported QSHIs. We applied a compressed-sensing approach to identify a physically meaningful descriptor for the Z2 invariant that only depends on the properties of the material's constituent atoms. This enables us to draw a map of materials, in which metals, trivial insulators, and QSHI form distinct regions. This analysis yields fundamental insights in the mechanisms driving topological transitions. The transferability of the identified model is explicitly demonstrated for an additional set of honeycomb lattices with different functionalizations that are not part of the original set of 220 graphene-type materials used to identify the descriptor. In this class, we predict 74 more novel QSHIs that have not been reported in literature yet.

Details

show
hide
Language(s): eng - English
 Dates: 2018-05-28
 Publication Status: Not specified
 Pages: 10
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: arXiv: 1805.10950
URI: http://arxiv.org/abs/1805.10950
 Degree: -

Event

show

Legal Case

show

Project information

show

Source

show